sh: Support early IRQ vector map reservation for delayed controllers.

Some controllers will need to be initialized lazily due to pinmux
constraints, while others may simply have no need to be brought online if
there are no backing devices for them attached. In this case it's still
necessary to be able to reserve their hardware vector map before dynamic
IRQs get a hold of them.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/sh/intc.c b/drivers/sh/intc.c
index e91a23e5ffd8..4e01d65e5edb 100644
--- a/drivers/sh/intc.c
+++ b/drivers/sh/intc.c
@@ -1377,6 +1377,17 @@ int reserve_irq_vector(unsigned int irq)
 	return ret;
 }
 
+void reserve_intc_vectors(struct intc_vect *vectors, unsigned int nr_vecs)
+{
+	unsigned long flags;
+	int i;
+
+	spin_lock_irqsave(&vector_lock, flags);
+	for (i = 0; i < nr_vecs; i++)
+		__set_bit(evt2irq(vectors[i].vect), intc_irq_map);
+	spin_unlock_irqrestore(&vector_lock, flags);
+}
+
 void reserve_irq_legacy(void)
 {
 	unsigned long flags;